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प्रश्न
Give reason for the following:
Atrial wall is less muscular than the ventricular wall.
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उत्तर
Atrial wall is less muscular than the ventricular wall because the major function of atria is
to receive blood from the body and pump in into very next ventricles. While the ventricles
pump the blood out of the heart. Right ventricle to the lungs and the left ventricle to all the
body parts.
संबंधित प्रश्न
Give reason, why a matured mammalian erythrocyte lacks nucleus and mitochondria?
Explain with reasons.
Human blood is red coloured.
Choose the correct answer:
English physician who discovered blood circulation was ___________
During surgical operations or during accidents, the patient may be given blood from outside to save his life. What is the technical name of this process? Briefly explain the precautions to be taken in this process.
Multiple choice questions. Tick ( ✓ ) the correct choice:
The four blood groups in humans are
Define the Arteries.
Write a short note on the human heart.
Given below is a schematic representation of the circulatory system in man. Study the same and answer the questions that follow:
(i) Label the parts 1 to 4 indicated in the diagram.
(ii) Give one difference between parts 1 and 2 based on:
(a) their structure
(b) the nature of blood flowing through them.
(iii) What is the specific name of the type of blood circulation that takes place between the heart and the lungs?
(iv) Name the valve found at the beginning of the part labeled 3.
The process of keeping the blood flowing continuously throughout the body.
Assertion (A): RBCs help in the transport of respiratory gases.
Reason (R): The cytoplasm of RBCs contains the respiratory pigment Haemoglobin.
